rs114759137

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_001365999.1(SZT2):c.5535T>G(p.Ser1845Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00262 in 1,613,606 control chromosomes in the GnomAD database, including 95 homozygotes. In-silico tool predicts a benign outcome for this variant. 12/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.014 ( 53 hom., cov: 32)

Exomes 𝑓: 0.0014 ( 42 hom. )

Consequence

SZT2
NM_001365999.1 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: -1.43

Publications

7 publications found

Variant links:

Genes affected

SZT2 (HGNC:29040): (SZT2 subunit of KICSTOR complex) The protein encoded by this gene is expressed in the brain, predominantly in the parietal and frontal cortex as well as in dorsal root ganglia. It is localized to the peroxisome, and is implicated in resistance to oxidative stress. It likely functions by increasing superoxide dismutase (SOD) activity, but itself has no direct SOD activity. Studies in mice show that this gene confers low seizure threshold, and may also enhance epileptogenesis. [provided by RefSeq, Jun 2011]

SZT2 Gene-Disease associations (from GenCC):

developmental and epileptic encephalopathy, 18
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P, Illumina
genetic developmental and epileptic encephalopathy
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
undetermined early-onset epileptic encephalopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

SZT2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0017289519).

BP6

Variant 1-43432732-T-G is Benign according to our data. Variant chr1-43432732-T-G is described in ClinVar as Benign. ClinVar VariationId is 260618.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0141 (2149/151894) while in subpopulation AFR AF = 0.0493 (2041/41370). AF 95% confidence interval is 0.0476. There are 53 homozygotes in GnomAd4. There are 997 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 53 AR,AD gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001365999.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SZT2	NM_001365999.1	MANE Select	c.5535T>G	p.Ser1845Arg	missense	Exon 39 of 72	NP_001352928.1
	SZT2	NM_015284.4		c.5364T>G	p.Ser1788Arg	missense	Exon 38 of 71	NP_056099.3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SZT2	ENST00000634258.3	TSL:5 MANE Select	c.5535T>G	p.Ser1845Arg	missense	Exon 39 of 72	ENSP00000489255.1
SZT2	ENST00000562955.2	TSL:5	c.5364T>G	p.Ser1788Arg	missense	Exon 38 of 71	ENSP00000457168.1
SZT2	ENST00000638769.1	TSL:3	n.133T>G		non_coding_transcript_exon	Exon 2 of 3

Frequencies

GnomAD3 genomes

AF:

0.0141

AC:

2138

AN:

151776

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0492

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00499

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000833

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.0115

GnomAD2 exomes

AF:

0.00360

AC:

902

AN:

250470

AF XY:

0.00263

show subpopulations

Gnomad AFR exome

AF:

0.0498

Gnomad AMR exome

AF:

0.00209

Gnomad ASJ exome

AF:

0.0000995

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000618

Gnomad OTH exome

AF:

0.00213

GnomAD4 exome

AF:

0.00142

AC:

2078

AN:

1461712

Hom.:

Cov.:

AF XY:

0.00126

AC XY:

918

AN XY:

727148

show subpopulations

African (AFR)

AF:

0.0499

AC:

1671

AN:

33474

American (AMR)

AF:

0.00277

AC:

124

AN:

44692

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26126

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.000174

AC:

AN:

86232

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53398

Middle Eastern (MID)

AF:

0.00347

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000477

AC:

AN:

1111948

Other (OTH)

AF:

0.00323

AC:

195

AN:

60382

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.474

Heterozygous variant carriers

113

226

339

452

565

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

108

162

216

270

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0141

AC:

2149

AN:

151894

Hom.:

Cov.:

AF XY:

0.0134

AC XY:

997

AN XY:

74190

show subpopulations

African (AFR)

AF:

0.0493

AC:

2041

AN:

41370

American (AMR)

AF:

0.00491

AC:

AN:

15262

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5170

South Asian (SAS)

AF:

0.000625

AC:

AN:

4798

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10546

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000588

AC:

AN:

67970

Other (OTH)

AF:

0.0114

AC:

AN:

2102

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.511

Heterozygous variant carriers

111

221

332

442

553

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

110

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00531

Hom.:

Bravo

AF:

0.0164

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.0508

AC:

224

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.00435

AC:

528

Asia WGS

AF:

0.00202

AC:

AN:

3478

EpiCase

AF:

0.000218

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:4

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

Mar 05, 2018

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Feb 02, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Aug 08, 2019

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not specified

Benign:1

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Developmental and epileptic encephalopathy, 18

Benign:1

Apr 11, 2023

Genome-Nilou Lab

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Inborn genetic diseases

Benign:1

Mar 18, 2016

Ambry Genetics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity.

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

-0.62

BayesDel_noAF

Benign

-0.63

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.15

Eigen

Benign

-0.97

Eigen_PC

Benign

-0.91

FATHMM_MKL

Benign

0.13

LIST_S2

Benign

0.55

MetaRNN

Benign

0.0017

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.8

PhyloP100

-1.4

PrimateAI

Benign

0.43

PROVEAN

Uncertain

-2.5

Sift

Uncertain

0.019

Sift4G

Uncertain

0.020

Polyphen

0.0010

Vest4

0.14

MutPred

0.15

Loss of phosphorylation at S1788 (P = 0.0151)

MVP

0.17

MPC

0.29

ClinPred

0.0023

GERP RS

-4.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.063

gMVP

0.33

Mutation Taster

=96/4

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over